MoinMoin would be missing a lot of features without the help of its users and developers. MoinMoin is written in Python1 and uses the Mercurial2 version control system. Information on the MoinMoin source code and other developer issues can be found on MoinDev (main wiki) and its subpages. Here is what you can do to help improve MoinMoin:

If something looks broken first check if the bug is already reported on MoinMoinBugs. If it's a new bug then report it on the same page.

If something looks like it is missing make a FeatureRequest (also search before writing a new).